| 270 Center; Audubon Square; B.C. Thorpe Tract; Brighton West Condominiums; Brookes, Russell, Walker Addition; Brown's Addition; CSPC; Cedar Village; DeSellum Avenue; Diamond Farms Commercial; Emory Woods; Fernshire Woods; Kelley Park; Kentlands; Lakeforest; Lakelands Ridge; Meem's Addition Com-Industrial; Montpelier; Orchard Hills; Park Summit; Parklands at Watkins Mill Town Center; Rosemont; Seneca Mews; Solitaire Court; Summit Hall Reserve; The Point at Watkins Mill; Village Overlook; Warther; Washingtonian Village |
| Amberfield; Brighton Village; Diamond Farms; Fireside Condominiums; Forest Oak Towers; Gateway Park; Hidden Creek; Hidden Orchards; Izaak Walton League of America; Joan's Hill; Metropolitan Grove; Montgomery County Agricultural Fairgrounds; Morris Park and Summit Hall ES; Newport Estates; North Frederick Avenue/Hechinger/Mardirossian's Addition; North Frederick Commercial; Orchard Glen; Pheasant Run; Potomac Oaks; Seneca Ridge; Shady Grove North; Shady Grove Village; Summit Park; The Woods at Muddy Branch; Water Street |
| Avenel Executive Park; Bridlewood; Deer Park Place; Diamond Square; Emory Grove; Emory Hills; Foxwood; GE Technology Park; Gaithersburg Green Park; Gaithersburg North Research & Development; Governor's Square Apartments; Hunt Club Apartments; Leafy Overlook; Metropolitan Grove Park; Montgomery Meadows; Olde Towne; Orchard Place; PEPCO South; Potomac Valley Shopping Center; Quince Orchard Park; Realty Park; Russell Office Park Condo; Saybrooke; Seneca Creek State Park; South Frederick Avenue Commercial; Summit Hall; The Fields of Gaithersburg; Timberbrook; Washingtonian Center; Washingtonian Woods; Windbrooke Condo |
| Asbury Methodist Village; Bennington; Brighton East Condominiums; Crown Pointe; Dart Property; Festival at Muddy Branch; Fields Road ES; Gaithersburg Square; Gateway Commons; Hidden Creek Park; Highland Square Apartments; Lakeforest Glen; Longdraft Estates; Meem's Addition; Muddy Branch Square; Muddy Branch Stream Valley; Observatory Heights; Orchard Pond Apartments; Rabbitt Park; Rashidian Estates; Shady Grove Development Park; Spectrum at Watkins Mill; The Orchards; Villa Ridge; West Riding; Westleigh; Woodland Hills |
| Brighton East; Crown Farm; Deer Park; Diamond Farm Park & Brown Station ES; Dorsey Estates; Fernshire Farms; First Baptist Church of Gaithersburg; Forest Oak Middle School/MCPS; Grove Apartments; Lakelands; Longdraft Oaks; Maple Hill; Mission Hills; NIKE Missile; North Frederick Corridor; North Frederick Office Park; Olde Carriage Hill; PEPCO North; Quince Tree Executive Center; Rawlings Rest; Relda Square; Rosedale; Washington Suburban Sanitary Commission; Whetstone Run; Johnson Property |